From: Eric Lowe <elowe@myrile.madriver.k12.oh.us>
To: Chris Evans <chris@scary.beasts.org>
Cc: linux-mm@kvack.org
Subject: Re: 2.4.0test9 vm: disappointing streaming i/o under load
Date: Wed, 11 Oct 2000 07:38:08 -0400 (EDT) [thread overview]
Message-ID: <Pine.BSF.4.10.10010110734570.38557-100000@myrile.madriver.k12.oh.us> (raw)
In-Reply-To: <Pine.LNX.4.21.0010110056230.7853-100000@ferret.lmh.ox.ac.uk>
Hello,
> Finally got round to checking out 2.4.0test9.
>
> Unfortunately, 2.4.0test9 exhibits poor streaming i/o performance when
> under a bit of memory pressure.
>
> The test is this: boot with mem=32M, log onto GNOME and start xmms playing
> a big .wav ripped from a CD (this requires 100-200k read i/o per second).
>
> Then, I start then kill netscape. I then started a find / and started
> gnumeric firing up at the same time.
Would you try setting /proc/sys/vm/page-cluster to 8 or 16 and let
me know the results? I think one _part_ of the problem is that
when the swapper isn't agressive enough, it causes too much disk
thrashing which gets in the way of normal I/O... my experience
has been that with modern disks with 512K+ cache you have to
write in 64K clusters to get optimum throughput.
Eric
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux.eu.org/Linux-MM/
next prev parent reply other threads:[~2000-10-11 11:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200010090419.e994JQT09775@trampoline.thunk.org>
2000-10-10 20:53 ` Updated 2.4 TODO List Rik van Riel
2000-10-11 0:06 ` 2.4.0test9 vm: disappointing streaming i/o under load Chris Evans
2000-10-11 11:38 ` Eric Lowe [this message]
2000-10-11 20:59 ` Chris Evans
2000-10-11 22:10 ` Roger Larsson
2000-10-11 22:46 ` Chris Evans
2000-10-13 16:57 ` Rik van Riel
2000-10-11 18:38 ` Updated 2.4 TODO List tytso
2000-10-11 23:52 ` [RFC] atomic pte updates for x86 smp Ben LaHaise
2000-10-12 0:09 ` Linus Torvalds
2000-10-12 4:03 ` Benjamin C.R. LaHaise
2000-10-12 4:06 ` David S. Miller
2000-10-12 4:31 ` Cort Dougan
2000-10-12 4:37 ` Benjamin C.R. LaHaise
2000-10-12 6:42 ` Linus Torvalds
2000-10-12 8:13 ` Ingo Molnar
2000-10-12 8:56 ` David S. Miller
2000-10-12 10:05 ` Ingo Molnar
2000-10-12 11:10 ` Ingo Molnar
2000-10-12 15:10 ` Benjamin C.R. LaHaise
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.BSF.4.10.10010110734570.38557-100000@myrile.madriver.k12.oh.us \
--to=elowe@myrile.madriver.k12.oh.us \
--cc=chris@scary.beasts.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox